diff --git a/src/plasma/corona.h b/src/plasma/corona.h
--- a/src/plasma/corona.h
+++ b/src/plasma/corona.h
@@ -314,6 +314,16 @@
      */
     void immutabilityChanged(Plasma::Types::ImmutabilityType immutability);
 
+    /** This signal indicates the screen with the specified id was removed.
+     * @since 5.40
+     */
+    void screenRemoved(int id);
+
+    /** This signal indicates a new screen with the specified id was added.
+     * @since 5.40
+     */
+    void screenAdded(int id);
+
 #ifndef PLASMA_NO_DEPRECATED
     /**
      * Emitted when the package for this corona has been changed.
diff --git a/src/plasma/corona.cpp b/src/plasma/corona.cpp
--- a/src/plasma/corona.cpp
+++ b/src/plasma/corona.cpp
@@ -267,6 +267,11 @@
     return -1;
 }
 
+int Corona::screenIdForName(const QString &name) const
+{
+    return -1;
+}
+
 int Corona::numScreens() const
 {
     return 1;